CN101805124B - Optical glass and optical element - Google Patents

Optical glass and optical element Download PDF

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CN101805124B
CN101805124B CN 201010152006 CN201010152006A CN101805124B CN 101805124 B CN101805124 B CN 101805124B CN 201010152006 CN201010152006 CN 201010152006 CN 201010152006 A CN201010152006 A CN 201010152006A CN 101805124 B CN101805124 B CN 101805124B
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opticglass
glass
optical
bao
mgo
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CN101805124A (en
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孙伟
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CDGM Glass Co Ltd
Chengdu Guangming Optoelectronics Co Ltd
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Chengdu Guangming Optoelectronics Co Ltd
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Abstract

The invention discloses optical glass and an optical element. The optical glass comprises the following components: 55-66wt% of P2O5, 2-12wt% of Al2O3, 1-10wt% of K2O, 1-10wt% of BaO, 3-10wt% of MgO and 1-10wt% of B2O3. Experimental results show that the refractive index of the optical glass is 1.5-1.6, Abbe number is 67-72, and when the transmittance of the optical glass is 80%, the corresponding wavelength is less than 345nm and the transition temperature is lower than 520 DEG C, thereby lowering the cost in production.

Description

A kind of opticglass and optical element
Technical field
The present invention relates to the glass technology field, more particularly, relate to a kind of opticglass and optical element.
Background technology
In recent years, along with increased popularity such as digital camera, digital camera, camera cell phones, the integrated level that is used for the equipment of optical system increases and function increases sharply, so require optical system to have higher accuracy, lighter weight and less size.Therefore, aspherical mirror is widely used, and uses the aspheric surface assembly to become the main flow of optical design.
The manufacturing of non-spherical lens is widely used the method for accurate die pressing.So-called accurate die pressing, be exactly under certain temperature, pressure, with the high-accuracy mould moulded glass prefabricated component with predetermined prod shape, thereby obtain to have the finished product shape or be in close proximity to the finished product shape, and have the glasswork of optical function face.Adopt the non-spherical lens of accurate die pressing technology manufacturing not need to carry out again grinding and polishing, thereby can simplify working process.
The opticglass that is used for non-spherical lens, requirement has low dispersive power and high index, in modern imaging device, use more, such as: disclose this type of low-dispersion optical glass for mold in the documents such as Chinese patent ZL200310114721.7,200710006345.8, No. the 4286652nd, Japan's special permission, No. the 4322217th, special permission, JP 2006-225220, US Patent No. 6912093, US7490485 and european patent application 1433757A1, but had no the material that can be used for precise compression molding.
Chinese patent CN1692085A discloses a kind of opticglass, comprises that composition has P 2O 5, B 2O 3, Li 2O and MgO.Li 2O is strong fusing assistant, can reduce the softening temperature of glass, improves output and the quality of glass.Because Li is less at occurring in nature content, thereby cost is higher.
When carrying out precise compression molding; for high-accuracy die face is replicated on the glass ware forming product; need to be near the glass softening point temperature extrusion forming glass preform; at this moment shaping mould is exposed in the high temperature and is subjected to higher pressure; even be in the shielding gas, the casted die mould superficial film is easily oxidized, erosion still.In the prior art, because the transition temperature (Tg) of glass material is higher, the temperature that therefore needs when carrying out precise compression molding is higher, and casted die mould easily is damaged, thereby cost is higher.
Summary of the invention
In view of this, it is 1.5～1.6 that the technical problem to be solved in the present invention is to provide a kind of specific refractory power, and Abbe number is 67～72, and when transmittance reached 80%, corresponding wavelength was less than 345nm, and transition temperature is less than 520 ℃ opticglass and optical element.
The invention provides a kind of opticglass, comprise following composition:
The P of 55wt%～66wt% 2O 5
The Al of 2wt%～12wt% 2O 3
The K of 1wt%～10wt% 2O;
The BaO of 1wt%～10wt%;
The MgO of 3wt%～10wt%;
The B of 1wt%～10wt% 2O 3
Preferably, also comprise:
The Na of 0～8wt% 2O, CaO, SrO, La 2O 3, Gd 2O 3, Y 2O 3And Yb 2O 3In one or more, the total content of described CaO and SrO is 0～15wt%, described La 2O 3, Gd 2O 3, Y 2O 3And Yb 2O 3Total content be 0～15wt%.
Preferably, comprising:
The total content of CaO and SrO is 1wt%～10wt%;
La 2O 3, Gd 2O 3, Y 2O 3And Yb 2O 3Total content be 1wt%～10wt%.
Preferably, comprising:
The P of 60wt%～66wt% 2O 5
Preferably, comprising:
The Al of 2wt%～8wt% 2O 3
Preferably, comprising:
The K of 3wt%～9wt% 2O.
Preferably, comprising:
The BaO of 2wt%～9wt%.
Preferably, comprising:
The MgO of 4wt%～9wt%.
Preferably, comprising:
The B of 4wt%～10wt% 2O 3
Preferably, specific refractory power is 1.5～1.6;
Abbe number is 67～72;
Transition temperature is less than 520 ℃;
When transmittance reached 80%, corresponding wavelength was less than 345nm.
The present invention also provides a kind of technique scheme optical element that described opticglass forms.
The invention provides a kind of opticglass and optical element, opticglass comprises the P of following composition: 55wt%～66wt% 2O 5The Al of 2wt%～12wt% 2O 3The K of 1wt%～10wt% 2O; The BaO of 1wt%～10wt%; The MgO of 3wt%～10wt%; The B of 1wt%～10wt% 2O 3P 2O 5Being the main component that consists of glass structure, is effectively for the mechanical property that improves opticglass, is conducive to improve the stability of glass.Al 2O 3Can reduce the crystallization tendency of opticglass, improve chemical stability, thermostability, physical strength, hardness and the improvement opticglass devitrification resistance of glass.K 2O can reduce the viscosity of glass, makes glass be easy to melt, and can reduce the crystallization tendency of glass, increases transparency and the gloss of glass.BaO can increase specific refractory power, density, gloss and the stability, glass of opticglass.MgO can make the setting rate of glass slack-off, improves the forming property of glass, can also improve chemical stability and the physical strength of glass.B 2O 3A kind of important oxide compound that forms opticglass, effective for the network that forms opticglass, dispersion and the coefficient of expansion of glass be can reduce, and thermostability and the chemical stability of glass are conducive to improve, reduce transition temperature and the melt temperature of glass.Experimental result shows, optical glass refractive index provided by the invention is 1.5～1.6, and Abbe number is 67～72, and when transmittance reached 80%, corresponding wavelength was less than 345nm, and transition temperature is less than 520 ℃, thereby reduced aborning cost.
Embodiment
The below will be clearly and completely described the technical scheme in the embodiment of the invention, and obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The invention provides a kind of opticglass, comprise following composition:
The P of 55wt%～66wt% 2O 5
The Al of 2wt%～12wt% 2O 3
The K of 1wt%～10wt% 2O;
The BaO of 1wt%～10wt%;
The MgO of 3wt%～10wt%;
The B of 1wt%～10wt% 2O 3
P 2O 5Being the main component that consists of glass structure, is effectively for the mechanical property that improves opticglass, is conducive to improve the stability of glass.Work as P 2O 5During less than 55wt%, be difficult to satisfy the requirement of optical property, the stability of glass and weathering resistance descend simultaneously; P 2O 5During greater than 66wt%, specific refractory power and the scattering of opticglass diminish, and can not satisfy the requirement of optical property.Among the present invention, P in the opticglass 2O 5Content be defined as 55wt%～66wt%, be preferably 60wt%～66wt%.
Al 2O 3Can reduce the crystallization tendency of opticglass, improve chemical stability, thermostability, physical strength, hardness and the improvement opticglass devitrification resistance of glass.Among the present invention, the Al in the opticglass 2O 3Content be defined as 2wt%～12wt%, be preferably 2wt%～8wt%.
K 2O can reduce the viscosity of glass, makes glass be easy to melt, and can reduce the crystallization tendency of glass, increases transparency and the gloss of glass.Among the present invention, K in the opticglass 2The content of O is defined as 1wt%～10wt%, is preferably 3wt%～9wt%.
BaO can increase specific refractory power, density, gloss and the stability, glass of opticglass.Among the present invention, the content of BaO is defined as 1wt%～10wt% in the opticglass, is preferably 2wt%～9wt%.
MgO can make the setting rate of glass slack-off, improves the forming property of glass, can also improve chemical stability and the physical strength of glass.Among the present invention, the content of MgO is defined as 3wt%～10wt% in the opticglass, is preferably 4wt%～9wt%.
B 2O 3A kind of important oxide compound that forms opticglass, effective for the network that forms opticglass, dispersion and the coefficient of expansion of glass be can reduce, and thermostability and the chemical stability of glass are conducive to improve, reduce transition temperature and the melt temperature of glass.B 2O 3Content be defined as 1wt%～10wt%, B 2O 3Content be lower than 1wt%, transition temperature raises, dispersion raises; B 2O 3Content be higher than 10wt%, increase the danger of glass phase-splitting.B 2O 3Content be preferably 4wt%～10wt%.
According to the present invention, described opticglass can also comprise the Na of 0～8wt% 2O, CaO, SrO, La 2O 3, Gd 2O 3, Y 2O 3And Yb 2O 3In one or more, the total content of described CaO and SrO can be 0～15wt%, described La 2O 3, Gd 2O 3, Y 2O 3And Yb 2O 3Total content can be 0～15wt%.
Na 2O is the opticglass fusing assistant, can reduce the viscosity of glass, makes opticglass be easy to melt.Na 2O is too much, will reduce thermostability, chemical stability and the physical strength of opticglass.Na 2The content of O can be 1wt%～8wt%, can also be 1wt%～7wt%.
The effect of CaO in glass is similar to BaO.The effect of SrO in glass is similar to BaO, CaO, with SrO Substitute For Partial BaO, can accelerate fusing and the clarification of glass, reduces the tendency towards devitrification of glass, increases the effect of the specific refractory power of opticglass, and can improve the devitrification resistance of glass.The total content of described CaO and SrO can be 1wt%～15wt%, can also be 1wt%～10wt%.
La 2O 3It is the important component that obtains high-refractivity and low-dispersion glass.Gd 2O 3As La 2O 3Surrogate, can improve the specific refractory power of opticglass.Y 2O 3And Yb 2O 3Can play the effect of the specific refractory power that improves opticglass.Y 2O 3It is the composition of adjusting the optical constant of glass.Yb 2O 3Effect in opticglass and Y 2O 3Close, when its too high levels, the easy devitrification of opticglass.Described La 2O 3, Gd 2O 3, Y 2O 3And Yb 2O 3Total content can be 1wt%～15wt%, can also be 1wt%～10wt%.
The present invention also provides a kind of optical element that is formed by the described opticglass of technique scheme.Optical element of the present invention is formed by the opticglass of the invention described above, and therefore, this optical element has the various characteristics of above-mentioned opticglass.Optical element of the present invention has that specific refractory power is 1.5～1.6, Abbe number is 67～72, and when transmittance reached 80%, corresponding wavelength was less than 345nm.Optical element provided by the invention is applicable to digital camera, Digital Video and camera cell phone etc.
In order further to understand technical scheme of the present invention, below in conjunction with specific embodiment, the preferred embodiment of the invention is described, but is to be understood that, these are described just as further specifying the features and advantages of the present invention, rather than to the restriction of claim of the present invention.
Embodiment 1
Opticglass, it contains: the P of 65wt% 2O 5, the Al of 7.55wt% 2O 3, the K of 8.08wt% 2O, the BaO of 7.34wt%, the MgO of 4.53wt%, the B of 7.5wt% 2O 3
Specifeca tion speeification is:
Specific refractory power: nd=1.5224
Abbe number: vd=70.1
Transition temperature: Tg=518 ℃
Softening temperature: Ts=569 ℃
λ 80：341nm
Above-mentioned performance perameter is tested as follows.
Wherein specific refractory power (nd) value for (2 ℃/h)-(6 ℃/h) annealing value, specific refractory power and Abbe number are tested according to " GB/T 7962.1-1987 colouless optical glass testing method specific refractory power and abbe number ".
Transition temperature (Tg) is tested according to " GB/T7962.16-1987 colouless optical glass testing method linear expansivity, transition temperature and sag temperature ", that is: sample is in certain temperature range, 1 ℃ of the every rising of temperature, on the expansion curve of sample, low-temperature region and the extension of high-temperature area straight line portion are intersected the corresponding temperature of its intersection point.
Glass is made into the sample of 10mm ± 0.1mm thickness, tested glass reaches the wavelength X of 80% correspondence in transmittance 80
Above-mentioned performance parameter test method is applicable equally for following examples.
The opticglass component percentages that embodiment 2～13 provides and corresponding performance are shown in table 1, table 2.
The component percentages of the opticglass that table 1 embodiment 2～7 provides and corresponding performance
Figure GSA00000071671800061
The opticglass component percentages that table 2 embodiment 8～13 provides and corresponding performance
Figure GSA00000071671800062
The in proportion weighing of raw material that composition shown in the above-mentioned opticglass is corresponding fully mixes, fusing on the continuous smelting tank furnace, clarification, homogenizing, and the metal pattern of preheating is injected in cooling, and annealing obtains opticglass.
For the preparation method of opticglass provided by the invention, there is no particular restriction, is prepared according to method well known to those skilled in the art.With raw material melt, clarification, homogenizing, cooling moulding, obtain opticglass.
The opticglass that the embodiment of the invention 1～13 provides is prepared as follows:
With the in proportion weighing of the corresponding raw material of composition of opticglass among the embodiment 1～13, add on the continuous smelting tank furnace fusing, clarification and homogenization about 1000 ℃～1380 ℃ after fully mixing;
Metal pattern after about 450～510 ℃ melten glass being poured into preheating;
Obtain opticglass, the correlation parameter of measuring optical glass after the melten glass that injects the metal pattern after the preheating put into annealing furnace Xu Leng annealing together with metal pattern.The opticglass that embodiment 1～13 provides not crystallization, devitrification not when die mould.
Can find out from above-described embodiment, the optical glass refractive index that the embodiment of the invention provides is 1.5～1.6, and Abbe number is 67～72, and when transmittance reached 80%, corresponding wavelength was less than 345nm, and transition temperature is less than 520 ℃, thereby has reduced aborning cost.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from the spirit or scope of the present invention, in other embodiments realization.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (8)

1. an opticglass is characterized in that, comprises following composition:
The P of 60wt%～64wt% 2O 5
The Al of 2wt%～12wt% 2O 3
The K of 1wt%～10wt% 2O;
The BaO of 1wt%～10wt%;
The MgO of 3wt%～10wt%;
The B of 6wt%～10wt% 2O 3
2. opticglass according to claim 1 is characterized in that, also comprises:
The Na of 0～4wt% 2O.
3. opticglass according to claim 1 is characterized in that, comprising:
The Al of 2wt%～8wt% 2O 3
4. opticglass according to claim 1 is characterized in that, comprising:
The K of 3wt%～9wt% 2O.
5. opticglass according to claim 1 is characterized in that, comprising:
The BaO of 2wt%～9wt%.
6. opticglass according to claim 1 is characterized in that, comprising:
The MgO of 4wt%～9wt%.
7. the described opticglass of any one is characterized in that according to claim 1～6,
Specific refractory power is 1.5～1.6;
Abbe number is 67～72;
Transition temperature is less than 520 ℃;
When transmittance reached 80%, corresponding wavelength was less than 345nm.
8. the optical element that forms of the described opticglass of claim 1～7 any one.
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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1495142A (en) * 2002-08-23 2004-05-12 Ф�ز������쳧 Leadless and specially arseniumless optical double-crown glass

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Publication number Priority date Publication date Assignee Title
EP1555247A1 (en) * 2004-01-16 2005-07-20 Schott AG Optical glass in particular for press-moulded optical elements
JP2006001808A (en) * 2004-06-18 2006-01-05 Isuzu Seiko Glass Kk Near infrared ray cutting glass
US20070099787A1 (en) * 2005-04-22 2007-05-03 Joseph Hayden Aluminophosphate glass containing copper (II) oxide and uses thereof for light filtering

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1495142A (en) * 2002-08-23 2004-05-12 Ф�ز������쳧 Leadless and specially arseniumless optical double-crown glass

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